Systems Engineer On-Site

S3I Engineering provides specialty engineering services, systems integration, and operational support to US Government agencies. Our technical expertise covers multiple facets of the Software, Systems, Cyber, and Hardware Engineering disciplines. Our engineers have expert knowledge of the critical mission management systems and their deployment on various DOD, DHS, and other platforms.

S3I is currently looking for entry and mid-level Systems Engineers. You will be working with cutting‑edge technology to test complex mission management systems and their sensors. From testing capabilities to optimizing performance and reliability, your expertise will play a pivotal role in ensuring mission success. If you love to solve hard complex problems and are willing to embrace the challenge, embark on a career where every day brings new opportunities to push the boundaries of what is possible.

Join us and be a part of shaping the future.

Job Title:

Systems Engineer I

Work Schedule:

M-F, 8AM-5PM, Flexible
Job Classification:
Exempt
Primary

Location:

Lexington Park, MD
Travel: 12-18 weeks per year
Salary Range: $90,000 to $130,000 depending on experience and skill set

Systems Engineer I

The Systems Engineer I supports the development, integration, testing, and analysis of mission systems and sensors deployed across DoD platforms. This role focuses on troubleshooting, system configuration, testing execution, and technical documentation within structured engineering processes. This work includes laboratory and field test activities associated with complex sensor and mission systems.

• Assist in the installation, configuration, and testing of mission systems with related sensors and other integrated software within government labs and aircraft environments.
• Conduct basic troubleshooting using Linux command‑line tools and established diagnostic procedures.
• Configure test bench systems to support validation of software requirements and system behavior.
• Support reproduction of system anomalies reported from fielded systems and assist in documenting root cause indicators.
• Participate in design reviews under supervision, offering technical observations aligned with requirements derivation.
• Prepare field test reports, summary documents, and structured notes for senior engineers and government personnel.
• Follow DoD and DCSA cybersecurity practices during configuration, testing, and system interaction.
• Provide dependable and professional support to government stakeholders and partner organizations.
• Support tasking outside of normal business hours (